package com.sky.controller.user;

import cn.hutool.json.JSONUtil;
import com.alibaba.fastjson.JSONArray;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.github.xiaoymin.knife4j.core.util.StrUtil;
import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import nonapi.io.github.classgraph.json.JSONUtils;
import org.apache.commons.lang.StringEscapeUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    private static final ObjectMapper mapper=new ObjectMapper();

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {

        //构造redis中的key
        String key="dish_"+categoryId;


        //查询redis中是否有缓存菜品
        String dishJson = stringRedisTemplate.opsForValue().get(key);
        if (StrUtil.isNotBlank(dishJson)){

            List<DishVO> list = (List<DishVO>) JSONArray.parse(dishJson);


            return Result.success(list);
        }



        //如果存在，直接返回，不用查数据库

        //如果不存在，查询数据库，并且返回缓存
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);//查询起售中的菜品

        List<DishVO> list =  dishService.listWithFlavor(dish);



       stringRedisTemplate.opsForValue().set(key,JSONUtil.toJsonStr(list));



        return Result.success(list);
    }

}
